LED Driver IC includes diagnostic function.
Share:
Press Release Summary:
Featuring 16 regulated ports, Model AS1110 provides constant current for driving LEDs within wide range of forward voltage variations. Output ports are guaranteed to endure max voltage of 15 V, and through external resistor, currents can be adjusted from 0.5-100 mA. With error diagnostics, device can detect any open- or short-circuit as well as over-temperature occurrence. Operating from -40 to +85°C, AS1110 features 30 MHz serial interface, ensuring high refresh rates.
Original Press Release:
Austriamicrosystems Unveils 16-Channel Constant Current LED Drivers With Innovative Diagnostics Function
Unterpremstaetten, Austria (February 21, 2007) - austriamicrosystems (SWX: AMS), a leading global designer and manufacturer of analog integrated circuits (ICs) for communication, industrial, medical and automotive applications, introduces the AS1110 16-channel constant current LED driver with advanced error diagnostics for open and shorted LEDs. The AS1110 follows the successful AS1109 while doubling the output channels. The AS1110 uses the serial data input/output lines for the error information readback so that no additional PCB tracks are needed for LED error diagnostics.
"As the resolution of LED displays increases, the market is demanding more accurate LED drivers in smaller packages that are able to drive a large number of LEDs. Additionally, LED error detection is becoming a very important factor, not only for security related applications like traffic signs, but also for commercial applications such as information displays or video walls, in order to optimize maintenance cost," said Walter Moshammer, Director Marketing Standard Linear at austriamicrosystems.
"Housed in a small package and offering extremely high performance, as well as best-in-class accuracy with LED error detection, the AS1110 addresses these market demands."
The AS1110 features sixteen regulated ports that provide constant current for driving LEDs within a wide range of forward voltage variations. The AS1110 output ports are guaranteed to endure a maximum voltage of 15V. Through an external resistor the currents can be adjusted from 0.5 to 100mA which gives the utmost flexibility in controlling LED brightness. With an excellent accuracy of ±3% between channels, the AS1110 improves picture quality of LED displays since intensity variations between LEDs and LED modules completely disappear.
The AS1110, as the AS1109, can be used in multiplexed mode, meaning that a single AS1110 can drive up to 64 independent LED nodes. In this multiplexed mode the AS1110 still maintains the full functionality of the error detection.
Another highlight of the AS1110 is the built-in LED error detection. Easy and intuitive to use, it can be invoked during normal operation without switching into a separate detection mode. This makes the software interface even more user-friendly while detection can be done extremely fast. The AS1110 can detect any open- or short-circuit as well as an over-temperature occurrence. For immediate detection of those errors, a global error flag is available at serial data output, detecting any of those errors quickly and precisely. Furthermore, a detailed error report can be produced with the exact position of the broken LED.
In order to avoid the typical flickering of LED displays during error detection, austriamicrosystems has introduced the Low-Current Diagnostic mode. In this mode, a small test current of only 0.6mA is applied to the display for a very short time. As a result, LED testing is not visible and can therefore be applied during normal operation.
The fast 30MHz serial interface ensures high refreshing rates even for huge LED display modules. With an operating temperature range from -40 to +85°C, the AS1110 is also ideal for industrial and outdoor applications. The AS1110 is available in a 24-pin SSOP-150 and a small 28-pin QFN (5x5mm) package, allowing a very small pitch between LED pixels which is ideal for indoor LED displays.
More product specific information can be downloaded from the austriamicrosystems website at
http://austriamicrosystems.com/03products/products_detail/AS1110/description_AS1110.htm
About austriamicrosystems
austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining more than 25 years of analog design capabilities and system know-how with its own state-of-the-art manufacturing and test facilities. austriamicrosystems leverages its expertise in low power and high accuracy to provide industry-leading customized and standard analog products. Operating worldwide with more than 1,000 employees, austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces, portable audio and car access in its markets Communications, Industry & Medical and Automotive, complemented by its Full Service Foundry activities. austriamicrosystems is listed on the SWX Swiss Exchange in Zurich (ticker symbol: AMS). For more information, please visit the web site at www.austriamicrosystems.com.
Electronic picture and block diagram are available on request or at
http://austriamicrosystems.com/07presscenter/presscenter_start.htm
Technical Contact
austriamicrosystems AG
Manfred Kogler
Marketing Manager Standard Linear
Tel: +43 (0) 3136 500 5274
Fax: +43 (0) 3136 500 5420
manfred.kogler@austriamicrosystems.com
www.austriamicrosystems.com
